GB1378735A - Travelling wave tubes - Google Patents

Travelling wave tubes

Info

Publication number
GB1378735A
GB1378735A GB2347173A GB2347173A GB1378735A GB 1378735 A GB1378735 A GB 1378735A GB 2347173 A GB2347173 A GB 2347173A GB 2347173 A GB2347173 A GB 2347173A GB 1378735 A GB1378735 A GB 1378735A
Authority
GB
United Kingdom
Prior art keywords
frequency
wave
tapering
resonant
travelling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2347173A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teledyne UK Ltd
Original Assignee
English Electric Valve Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by English Electric Valve Co Ltd filed Critical English Electric Valve Co Ltd
Publication of GB1378735A publication Critical patent/GB1378735A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
    • H01J25/38—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward travelling wave being utilised

Landscapes

  • Microwave Tubes (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

1378735 Travelling-wave tubes ENGLISH ELECTRIC VALVE CO Ltd 17 May 1973 [22 Feb 1973] 23471/73 Heading H1D In a travelling-wave tube having a coupledcavity slow-wave structure with resonant coupling elements-e.g. slots or loops-coupling adjacent cavities, the resonant frequencies of the coupling elements at the output end of the structure obey a tapering law in which the frequency is convergent on the cavity resonant frequency towards the output, whereby the velocity tapering of the r.f. wave is a function of frequency over the operating bandwidth of the tube, to allow for the fact that the dispersive nature of the coupled-cavity structure produces increased slowing of the beam at the low frequency end of the band. For slot-coupled structures, e.g. of cloverleaf type, the dimensions of the slots, and in centipede structures either the amplitude or the circumferential spacing of the loops, may vary. The tapering law is preferably linear, and may provide part only of the velocity taper, the remainder being produced by a variation of the axial length of the cavities, which produces a frequency independent taper.
GB2347173A 1973-02-22 1973-05-17 Travelling wave tubes Expired GB1378735A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00334939A US3846664A (en) 1973-02-22 1973-02-22 Coupled cavity travelling wave tubes

Publications (1)

Publication Number Publication Date
GB1378735A true GB1378735A (en) 1974-12-27

Family

ID=23309531

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2347173A Expired GB1378735A (en) 1973-02-22 1973-05-17 Travelling wave tubes

Country Status (2)

Country Link
US (1) US3846664A (en)
GB (1) GB1378735A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145276A (en) * 1983-06-09 1985-03-20 Varian Associates Velocity tapering of comb-quad travelling-wave tubes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053810A (en) * 1976-06-25 1977-10-11 Varian Associates, Inc. Lossless traveling wave booster tube
DE7638147U1 (en) * 1976-12-06 1977-06-16 Siemens Ag, 1000 Berlin Und 8000 Muenchen DELAY LINE FOR TRAVELING AMPLIFIER TUBES
US4315194A (en) * 1980-02-20 1982-02-09 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Coupled cavity traveling wave tube with velocity tapering
FR2490872A1 (en) * 1980-09-19 1982-03-26 Thomson Csf COUPLED CAVITY DELAY LINE FOR PROGRESSIVE WAVE TUBE AND PROGRESSIVE WAVE TUBE HAVING SUCH A LINE
US4564787A (en) * 1983-05-09 1986-01-14 The United States Of America As Respresented By The Administrator Of The National Aeronautics And Space Administration Linearized traveling wave amplifier with hard limiter characteristics

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374390A (en) * 1960-09-16 1968-03-19 Varian Associates Traveling-wave tube having a slow-wave structure of the cloverleaf type wherein the height of the cloverleaf sections are tapered
US3274428A (en) * 1962-06-29 1966-09-20 English Electric Valve Co Ltd Travelling wave tube with band pass slow wave structure whose frequency characteristic changes along its length
US3555462A (en) * 1966-11-17 1971-01-12 Nippon Electric Co Waveguide-slow wave structure impedance matching device
US3448326A (en) * 1966-12-08 1969-06-03 Varian Associates Twt with cloverleaf slow-wave circuit having specially shaped coupling slots
US3532924A (en) * 1968-05-20 1970-10-06 Varian Associates Centipede slow wave circuit and microwave tubes using same
US3668459A (en) * 1970-09-08 1972-06-06 Varian Associates Coupled cavity slow wave circuit and tube using same
US3668460A (en) * 1970-11-16 1972-06-06 Varian Associates Coalesced mode coupled cavity slow wave tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145276A (en) * 1983-06-09 1985-03-20 Varian Associates Velocity tapering of comb-quad travelling-wave tubes

Also Published As

Publication number Publication date
US3846664A (en) 1974-11-05
DE2336167B2 (en) 1977-02-17
DE2336167A1 (en) 1974-09-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19930516